<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

    <el-button type="text" @click="openChapterDialog()">添加章节</el-button>
    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}

                <span class="acts">
                    <el-button type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>

            <!-- 视频 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}

                        <span class="acts">
                            
                            <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                            <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                        </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
    <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
    <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
        <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
        <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
        <el-radio-group v-model="video.isFree">
            <el-radio :label="0">默认</el-radio>
            <el-radio :label="1">免费</el-radio>
        </el-radio-group>
        </el-form-item>

        <!-- TODO -->
        <el-form-item label="上传视频">
            <!--  
                on-remove: 点击确认调用这个方法
                before-remove: 点击x的时候调用这个方法
            -->
            <el-upload
                :on-success="handleVodUploadSuccess"
                :on-remove="handleVodRemove" 
                :before-remove="beforeVodRemove"
                :on-exceed="handleUploadExceed"
                :file-list="fileList"
                :action="'http://localhost:8222/eduvod/video/uploadAiliyunVideo'"
                :limit="1"
                class="upload-demo">
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
                <div slot="content">最大支持1G，<br>
                    支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                    GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                    MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                    SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
                <i class="el-icon-question"/>
            </el-tooltip>
            </el-upload>
        </el-form-item>

            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
                <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
            </div>
    </el-dialog>

    

  </div>
</template>
<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'

export default {
    data() {
        return {
            saveBtnDisabled:false,
            courseId:'',//课程id
            chapterVideoList:[],
            chapter:{//封装章节数据
              
              title: '',
              sort: 0
            },
            video:{// 课时对象
                title: '',
                sort: 0,
                isFree: 0,
                videoSourceId: '',
                videoOriginalName:'',//视频上传名称
            },
            dialogChapterFormVisible:false,//章节弹框
            dialogVideoFormVisible:false, //小节弹框
            saveVideoBtnDisabled: false, // 课时按钮是否禁用
            fileList: [],//上传文件列表
            BASE_API: process.env.BASE_API  //接口api地址
            
        }
    },
    created() {
        //获取路由的id值
        if(this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id
            //根据课程id查询章节和小节
            this.getChapterVideo()
        }
    },
    methods:{ 
        //点击确定调用的方法
        handleVodRemove(){
            //调用接口的删除视频的方法
            video.deleteAlyVod(this.video.videoSourceId).then(response=>{
                //提示信息
                this.$message({
                    type: 'success',
                    message:  '删除视频成功！'
                })
                //把文件列表清空
                this.fileList=[]
                //把video视频的id和名称清空,不然数据库还是有数据
                this.video.videoOriginalName=''
                this.video.videoSourceId=''
            })
        },

        //点击x调用这个方法
        beforeVodRemove(file,fileList){
            return this.$confirm(`确定移除${file.name}?`)
        },
        //上传视频成功调用的方法
        handleVodUploadSuccess(response,file,fileList){
            //上传之后的视频id赋值
            this.video.videoSourceId  = response.data.videoId
            //上传之后的视频名称赋值
            this.video.videoOriginalName = file.name
        },
        //上传之前
        handleUploadExceed(){
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },
//=================================小节操作=========================================
        //添加小节弹框的方法
        openVideo(chapterId){
            this.video.title=''

 
            this.video.sort=''
            this.fileList=[]
            this.dialogVideoFormVisible=true
            //设置章节id
            this.video.chapterId = chapterId
            //设置 课程id
            this.video.courseId=this.courseId
        },
        //修改小节弹框 数据回显  videoId是点击编辑获取到的小节id
        openEditVideo(videoId){
            this.dialogVideoFormVisible=true
            video.getVideo(videoId).then(response=>{
                this.video = response.data.eduVideo
            })
        },
        //修改小节
        updateVideo(){
            video.updateVideo(this.video).then(response=>{
                //添加成功后 1关闭弹框
                this.dialogVideoFormVisible=false
                //提示信息
                this.$message({
                type: 'success',
                message: '修改小节成功!'
                });
                //刷新页面
                this.getChapterVideo()
                this.dialogVideoFormVisible=false
                this.video.title = ''// 重置章节标题
                this.video.sort = 0// 重置章节标题
                this.video.videoSourceId = ''// 重置视频资源id
            })
        },
        //添加小节
        addVideo(){
            video.addVideo(this.video).then(response=>{
                //添加成功后 1关闭弹框
                this.dialogVideoFormVisible=false

                //提示信息
                this.$message({
                    type: 'success',
                    message: '添加小节成功!'
                });

                //刷新页面
                this.getChapterVideo()
                })
        },
        saveOrUpdateVideo(){
            if (!this.video.id){
                this.addVideo()
            }else{
                this.updateVideo()
            }
        },
        //删除小节
        removeVideo(videoId){
            this.$confirm('此操作将永久删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                video.deleteVideo(videoId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除章节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
            }) //点击取消，执行catch方法

        },
//=================================章节操作=========================================

        //删除章节
        removeChapter(chapterId){
            this.$confirm('此操作将永久删除章节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                chapter.deleteChapter(chapterId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除小节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
            }) //点击取消，执行catch方法
        },

        //修改章节弹框 数据回显  chapterId是点击编辑获取到的章节id
        openEditChapter(chapterId){
            this.dialogChapterFormVisible=true
            chapter.getChapter(chapterId).then(response=>{
                this.chapter= response.data.chapter
            })
        },

        //弹出添加章节页面
        openChapterDialog(){
          //弹框
          this.dialogChapterFormVisible=true
          //表单数据的清空
          this.chapter.title=''
          this.chapter.sort=0
          this.chapter.id=''
        },
        //添加章节
        addChapter(){
          //设置课程id到chapter对象中去
          this.chapter.courseId=this.courseId
          chapter.addChapter(this.chapter).then(response=>{
            //添加成功后 1关闭弹框
            this.dialogChapterFormVisible=false

            //提示信息
            this.$message({
              type: 'success',
              message: '添加章节成功!'
            });

            //刷新页面
            this.getChapterVideo()
          })    
        },
        //修改章节的方法
        updateChapter(){
            chapter.updateChapter(this.chapter).then(response=>{
                this.dialogChapterFormVisible=false

                //提示信息
                this.$message({
                    type: 'success',
                    message: '修改章节成功!'
                });

                //刷新页面
                this.getChapterVideo()
            })
        },

        saveOrUpdate() {
            this.saveVideoBtnDisabled=true
            if(!this.chapter.id){
                this.addChapter()
            }else{
                this.updateChapter()
            }
        },
        //根据课程id查询章节和小节
        getChapterVideo() {
            chapter.getAllChapterVideo(this.courseId)
                .then(response => {
                    this.chapterVideoList = response.data.allChapterVideo
                })
        },
        //上一步
        previous() {
            this.$router.push({path:'/course/info/'+this.courseId})
        },
        next() {
            //跳转到第二步
            this.$router.push({path:'/course/publish/'+this.courseId})
        }
    }
}
</script>
<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>